Low-loss tunable metamaterials using superconducting circuits with Josephson junctions
Low-loss tunable metamaterials using superconducting circuits with Josephson junctions
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DOI：
10.1063/1.4792705
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发表时间：
2013-01
影响因子：
4
通讯作者：
P. Jung;S. Butz;S. Shitov;A. Ustinov
中科院分区：
文献类型：
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作者：
P. Jung;S. Butz;S. Shitov;A. Ustinov
我们报道了含有约瑟夫森结的超导超材料的实验。在这些结构中，传统超材料中使用的分裂环谐振器被约瑟夫森结（即rf- squid）打断的超导环路所取代。像分裂环谐振器一样，这些元件可以看作是与磁场耦合的lc谐振器。超导薄膜超材料的优点是，由于约瑟夫森结的固有电感可调，rf-SQUID的谐振频率可以通过施加外部直流磁场来改变。实验结果表明，这些器件的谐振频率是可调的。
We report on experiments with superconducting metamaterials containing Josephson junctions. In these structures, split-ring resonators used in conventional metamaterials are replaced by superconducting loops that are interrupted by Josephson junctions, so called rf-SQUIDs. Like the split-ring resonators, these elements can be seen as LC-resonators that couple to the magnetic field. The advantage of superconducting thin-film metamaterials is that, due to the tunable intrinsic inductance of the Josephson junction, the resonance frequency of the rf-SQUID can be changed by applying an external dc magnetic field. We present experimental results that demonstrate the tunability of the resonance frequency of these devices.